150 Mailboxes Per Domain
Google gives you 2. We give you 150. Do the math.
As low as $0.55/mailbox
What would 10,000 more cold emails do to your pipeline?
Advanced Azure cold email infrastructure. 150 mailboxes per domain — not 2. Auto DNS. Auto warmup. 99% inbox guaranteed. Ready in hours, not weeks.
Trusted by 200+ outbound teams
Cold Email Infrastructure
Everything you need to scale outbound
Built specifically for cold email. Not repurposed from consumer tools.
Dedicated IPs
Your reputation is yours alone. No shared pools.
Auto DNS Setup
SPF, DKIM, DMARC configured in minutes. Not hours.
99% Inbox Guarantee
Or your money back. We mean it.
Send From Day 1
No 2-week warmup wait. Start immediately.
2-4 Hour Setup
From signup to sending. Fully automated.
The Problem
You didn't sign up to be an IT admin.
But here you are. Creating your 30th Google Workspace. Manually adding DKIM records at 2am. Keeping a spreadsheet of 100 passwords. Waiting 4 weeks for domains to warm up while your competitors are already sending.
Google / Outlook
- 2 mailboxes per domain
- $7/mailbox/month
- Manual DNS for every domain
- 2-4 week warmup period
- Shared IPs with spammers
- Spreadsheets to track passwords
ColdRelay
- 150 mailboxes per domain
- As low as $0.55/mailbox
- Auto DNS in minutes
- Send from day 1
- Dedicated IPs, your reputation
- One dashboard for everything
From Zero to Sending
Three steps. Four hours. Done.
Simple and fast. No onboarding calls, no manual configuration, no weeks of waiting. Just infrastructure that works.
Set Up in Minutes
Tell us your volume. We calculate mailboxes and domains. One click and your infrastructure is building. No manual DNS. No spreadsheets.
Scale Without Limits
Start with 50 mailboxes. Scale to 5,000+. Volume discounts kick in automatically. No new contracts. No waiting.
Connect & Send
Plug SMTP credentials into Instantly, Smartlead, or any tool. Your infrastructure is ready. Start sending from day one.
Pricing
Calculate Your Exact Cost
No hidden fees. Slide to see your price at any scale.
How many emails per day do you want to send?
We'll calculate how many mailboxes + domains you need.
Each mailbox can send up to 4 emails/day. Each domain holds 100–150 mailboxes. We'll calculate the mailbox + domain requirements for you.
Most teams start between 1,000–3,000 emails/day.
Emails / day
emails/day
10020,000
Starter
100/day
Growth
1,000/day
Scale
3,000/day
Agency
10,000/day
You'll need 25 mailboxes (up to 4 emails/day each) and 1–1 domains (100–150 mailboxes/domain).
Mailboxes needed
25
Domains needed
1–1
Pricing tier
1–199
Price per mailbox
$1.00
What you'll get
Here's what teams typically unlock with ColdRelay:
Faster scale with predictable costs
Lower unit price at higher volume
Growth plan
Start sending 100 cold emails/day
$25
/mo
≈3,000 emails/month
100 emails/day•25 mailboxes•1–1 domains
Bulk discount applied ✅
Standard: $1.00/mailbox•Your rate: $1.00/mailbox
Save: $0/mo
Unlimited team seats
Mailbox + domain requirements calculated
Tier-based pricing as you scale
Deliverability-friendly sending model
Priority onboarding & support
Start Sending 100 Emails/Day 🚀↗
Real results from real teams
Outbound teams switch to ColdRelay and never look back.
“We contacted 641,000+ prospects over 12 weeks and saw a 3.3% positive reply rate. ColdRelay’s infrastructure handled the volume without a single deliverability issue.”
JB
Jake Brennan
CEO at ScaleOutbound · 1,000+ mailboxes
Frequently asked questions
Stop paying $7/mailbox for infrastructure that wasn't built for cold email.
Switch to purpose-built cold email infrastructure. Scale your outbound without scaling your costs.